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Cheap flights from Seattle to Chicago from £120

1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Seattle to Chicago

Cheap return flights

Enter your travel dates to find the best prices.
Frontier Logo
16:27 - 00:21SEA  Seattle/Tacoma Intl-ORD Chicago O'Hare Intl
5h 54m1 stop Denver Intl
Frontier Logo
06:30 - 15:12ORD  Chicago O'Hare Intl-SEA Seattle/Tacoma Intl
10h 42m1 stop Denver Intl
£212Frontier
Fri, 6 Nov - Wed, 11 Nov
Frontier Logo
16:27 - 00:21SEA  Seattle/Tacoma Intl-ORD Chicago O'Hare Intl
5h 54m1 stop Denver Intl
Frontier Logo
06:30 - 15:12ORD  Chicago O'Hare Intl-SEA Seattle/Tacoma Intl
10h 42m1 stop Denver Intl
£215Frontier
Fri, 6 Nov - Mon, 9 Nov
Alaska Airlines Logo
23:42 - 05:40SEA  Seattle/Tacoma Intl-ORD Chicago O'Hare Intl
3h 58mdirect
Alaska Airlines Logo
09:30 - 12:14ORD  Chicago O'Hare Intl-SEA Seattle/Tacoma Intl
4h 44mdirect
£222Alaska Airlines
Fri, 6 Nov - Wed, 11 Nov
Alaska Airlines Logo
09:08 - 18:59SEA  Seattle/Tacoma Intl-ORD Chicago O'Hare Intl
7h 51m1 stop San Diego
Alaska Airlines Logo
08:05 - 19:25ORD  Chicago O'Hare Intl-SEA Seattle/Tacoma Intl
13h 20m1 stop Santa Ana J. Wayne/Orange Cnty
£225Alaska Airlines
Tue, 17 Nov - Wed, 18 Nov
Multiple Airlines Logo
16:27 - 00:21SEA  Seattle/Tacoma Intl-ORD Chicago O'Hare Intl
5h 54m1 stop Denver Intl
Multiple Airlines Logo
15:59 - 18:48ORD  Chicago O'Hare Intl-SEA Seattle/Tacoma Intl
4h 49mdirect
£227Multiple Airlines
Fri, 6 Nov - Wed, 11 Nov
Multiple Airlines Logo
08:08 - 14:21SEA  Seattle/Tacoma Intl-ORD Chicago O'Hare Intl
4h 13mdirect
Multiple Airlines Logo
07:00 - 15:40ORD  Chicago O'Hare Intl-SEA Seattle/Tacoma Intl
10h 40m1 stop Denver Intl
£231Multiple Airlines
Fri, 27 Nov - Fri, 4 Dec
Alaska Airlines Logo
11:40 - 17:56SEA  Seattle/Tacoma Intl-ORD Chicago O'Hare Intl
4h 16mdirect
Alaska Airlines Logo
15:19 - 18:11ORD  Chicago O'Hare Intl-SEA Seattle/Tacoma Intl
4h 52mdirect
£232Alaska Airlines
Thu, 26 Nov - Fri, 11 Dec
Alaska Airlines Logo
23:42 - 05:40SEA  Seattle/Tacoma Intl-ORD Chicago O'Hare Intl
3h 58mdirect
Alaska Airlines Logo
09:30 - 12:14ORD  Chicago O'Hare Intl-SEA Seattle/Tacoma Intl
4h 44mdirect
£236Alaska Airlines
Wed, 11 Nov - Thu, 12 Nov
United Airlines Logo
22:56 - 05:06SEA  Seattle/Tacoma Intl-ORD Chicago O'Hare Intl
4h 10mdirect
United Airlines Logo
13:30 - 21:01ORD  Chicago O'Hare Intl-SEA Seattle/Tacoma Intl
9h 31m1 stop Washington, D.C. Dulles Intl
£237United Airlines
Fri, 27 Nov - Fri, 11 Dec
Alaska Airlines Logo
11:35 - 17:49SEA  Seattle/Tacoma Intl-ORD Chicago O'Hare Intl
4h 14mdirect
Alaska Airlines Logo
06:00 - 09:00ORD  Chicago O'Hare Intl-SEA Seattle/Tacoma Intl
5h 00mdirect
£240Alaska Airlines
Tue, 15 Dec - Fri, 1 Jan

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Frontier flights from Seattle to Chicago

Our best Frontier deals on Seattle to Chicago flight tickets
Frontier
6 Nov
SEA16:27Seattle/Tacoma Intl
5h 54m
1 stop
ORD00:21Chicago O'Hare Intl
11 Nov
ORD06:30Chicago O'Hare Intl
10h 42m
1 stop
SEA15:12Seattle/Tacoma Intl
£212
Frontier
6 Nov
SEA16:27Seattle/Tacoma Intl
5h 54m
1 stop
ORD00:21Chicago O'Hare Intl
9 Nov
ORD06:30Chicago O'Hare Intl
10h 42m
1 stop
SEA15:12Seattle/Tacoma Intl
£215
Frontier
6 Nov
SEA16:27Seattle/Tacoma Intl
5h 54m
1 stop
ORD00:21Chicago O'Hare Intl
9 Nov
ORD06:30Chicago O'Hare Intl
14h 03m
2 stops
SEA18:33Seattle/Tacoma Intl
£253

Alaska Airlines flights from Seattle to Chicago

Our best Alaska Airlines deals on Seattle to Chicago flight tickets
Alaska Airlines
6 Nov
SEA23:42Seattle/Tacoma Intl
3h 58m
ORD05:40Chicago O'Hare Intl
11 Nov
ORD09:30Chicago O'Hare Intl
4h 44m
SEA12:14Seattle/Tacoma Intl
£222
Alaska Airlines
17 Nov
SEA09:08Seattle/Tacoma Intl
7h 51m
1 stop
ORD18:59Chicago O'Hare Intl
18 Nov
ORD08:05Chicago O'Hare Intl
13h 20m
1 stop
SEA19:25Seattle/Tacoma Intl
£225
Alaska Airlines
26 Nov
SEA11:40Seattle/Tacoma Intl
4h 16m
ORD17:56Chicago O'Hare Intl
11 Dec
ORD15:19Chicago O'Hare Intl
4h 52m
SEA18:11Seattle/Tacoma Intl
£232

momondo Fare Finder

 
Use the filters below to find and compare flights from Seattle to Chicago that are best for you.

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Route

Depart

Return

Price

Cheapest return flight

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Fri 6/11

16:27-00:21

1 stop5h 54m

Chicago O'Hare Intl

Wed 11/11

06:30-15:12

1 stop10h 42m

£212

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Fri 6/11

16:27-00:21

1 stop5h 54m

Chicago O'Hare Intl

Mon 9/11

06:30-15:12

1 stop10h 42m

£215
Fastest return journey

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Fri 6/11

23:42-05:40

Nonstop3h 58m

Chicago O'Hare Intl

Wed 11/11

09:30-12:14

Nonstop4h 44m

£222

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Tue 17/11

09:08-18:59

1 stop7h 51m

Chicago O'Hare Intl

Wed 18/11

08:05-19:25

1 stop13h 20m

£225

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Fri 6/11

16:27-00:21

1 stop5h 54m

Chicago O'Hare Intl

Wed 11/11

15:59-18:48

Nonstop4h 49m

£227

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Fri 27/11

08:08-14:21

Nonstop4h 13m

Chicago O'Hare Intl

Fri 4/12

07:00-15:40

1 stop10h 40m

£231

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Thu 26/11

11:40-17:56

Nonstop4h 16m

Chicago O'Hare Intl

Fri 11/12

15:19-18:11

Nonstop4h 52m

£232

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Wed 11/11

23:42-05:40

Nonstop3h 58m

Chicago O'Hare Intl

Thu 12/11

09:30-12:14

Nonstop4h 44m

£236

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Fri 27/11

22:56-05:06

Nonstop4h 10m

Chicago O'Hare Intl

Fri 11/12

13:30-21:01

1 stop9h 31m

£237

SeattleChicago

SEA Seattle/Tacoma Intl - ORD Chicago O'Hare Intl

SEAORD

Seattle/Tacoma Intl

Tue 15/12

11:35-17:49

Nonstop4h 14m

Chicago O'Hare Intl

Fri 1/1

06:00-09:00

Nonstop5h 00m

£240

Flights are sorted by cheapest return flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Chicago from

How to get the cheapest flight ticket from Seattle to Chicago

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and Chicago?

Prices are currently low for flights on this route.

Typical prices usually range from £238 to £345.
The lowest price recently found on this route was £212.

What is the cheapest month to fly to Chicago?

The cheapest month to fly to Chicago from Seattle is in February. Flight prices, which tend to average around £181, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Chicago from Seattle during January instead. Flights to Chicago in January, while not as cheap as those in February, still average around £201.

What is the cheapest Seattle/Tacoma Intl to Chicago flight route?

Fly from Seattle/Tacoma Intl to Chicago Midway for the best Seattle/Tacoma Intl - Chicago flight prices

How far in advance should I book a flight from Seattle to Chicago?

You are more likely to see cheaper flights to Chicago from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Chicago for around £267 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Chicago from Seattle for as low as £218 on momondo.

What cabin class options are available on Seattle to Chicago flights?

There are 2 cabin classes available to choose from on Seattle to Chicago flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

How have Seattle to Chicago flight prices changed over time?

As of October 2026, prices for Seattle to Chicago flights are approximately 32% more expensive when compared to flights at the same time last year.

When to book flights from Seattle to Chicago

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Chicago according to our flight data. Find out which month and days have the cheapest flights.
Estimated return price

Cheap Seattle to Chicago (SEA to CHI) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Chicago

Best price found

£120

Direct flights

Every day

Airports in Chicago

3 airports
The best one-way flight to Chicago from Seattle in the past 72 hours is £120. The best return flight deal from Seattle to Chicago found on momondo in the last 72 hours is £212.
Direct flights go from Seattle to Chicago every day.
There are 3 airports in Chicago. From Seattle there are direct flights to Chicago O'Hare Intl (ORD).
Search flight deals

Frequently asked questions about flying from Seattle to Chicago

  • How far is Seattle/Tacoma Intl to Chicago by plane?

    The straight-line distance from Seattle/Tacoma Intl to Chicago is 1732.3 mi.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Chicago?

    Prices for flights from Seattle/Tacoma Intl Airport to Chicago are refreshed on a daily basis.

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Chicago?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Chicago.

  • What documentation or ID do you need to fly to Chicago?

    The necessary travel and health documents for your Chicago trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Seattle to Chicago?

Travelling to a place near Chicago?

Book flights to Chicago if you plan to visit one of these locations
Schererville

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Chicago?

Finding the right flight to Chicago from Seattle is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Chicago quick and easy, saving you time and money.

Can I find flights from Seattle to Chicago with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Chicago from Seattle with this policy.

How can momondo help me find flights from Seattle to Chicago?

momondo helps you find the best flight between Seattle and Chicago by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Seattle to Chicago right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to Chicago flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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Find better results for your trip to the United States

Fly into one of these airports located in Chicago

Chicago Midway Airport
Chicago O'Hare Intl Airport
Chicago Greater Rockford Airport